CN102763313B - Power supply device - Google Patents
Power supply device Download PDFInfo
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- CN102763313B CN102763313B CN201080064014.XA CN201080064014A CN102763313B CN 102763313 B CN102763313 B CN 102763313B CN 201080064014 A CN201080064014 A CN 201080064014A CN 102763313 B CN102763313 B CN 102763313B
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- 230000009467 reduction Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/15—Arrangements for reducing ripples from dc input or output using active elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0064—Magnetic structures combining different functions, e.g. storage, filtering or transformation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/327—Means for protecting converters other than automatic disconnection against abnormal temperatures
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A power supply device is provided with a first and second chopper circuits that adjust currents (I1, I2) flowing through magnetically coupled first and second reactors, respectively; and is also provided with a magnetically-coupled type multiphase converter that conducts voltage conversion between a DC power supply and a load and a control circuit. The control circuit comprises a decision unit (360) and a current-control unit (330). The decision unit (360) decides whether the temperature of the power supply is lower than a standard temperature. The current-control unit (330) will configure, when the temperature of the power supply is lower than the standard temperature, a duty command value (Id1) for the first chopper circuit, using a value that had an offset-amount added to the detected reactor current (I1) value, while configuring a duty command value (Id2) for the second chopper circuit, using the detected reactor current (I2) value, at the same time.
Description
Technical field
The present invention relates to supply unit, more specifically relate to the supply unit with the multiphase converter that comprises magnetic coupling type reactor.
Background technology
Known being configured to comprises the multiple transducers that are connected in parallel and staggers phase place and make the so-called multiphase converter of these transducer work.
In TOHKEMY 2003-304681 communique (patent documentation 1), disclose the motor vehicle driven by mixed power with following supply unit, described supply unit boosts to the voltage of DC power supply by multiphase converter as described above and is supplied to motor even load.
Prior art document
Patent documentation 1: TOHKEMY 2003-304681 communique
Patent documentation 2: TOHKEMY 2006-6073 communique
Patent documentation 3: TOHKEMY 2007-12568 communique
Summary of the invention
The problem that invention will solve
But, in above-mentioned document, do not record the temperature rise this point of utilizing the multiphase converter with magnetic coupling type reactor to make DC power supply.
The present invention proposes in order to solve such problem, and its object is, having in the supply unit of the multiphase converter that comprises magnetic coupling type reactor, by making pulsating current (ripple current) increase the temperature rise that makes DC power supply.
For the means of dealing with problems
Supply unit of the present invention, has: multiphase converter, is included in and is connected in the multiple chopper circuits that are connected in parallel between the power supply wiring of load and the power supply of direct current; And control circuit, control the work of multiple chopper circuits.Multiple chopper circuits comprise separately at least 1 switch element and are configured to the reactor that electric current is passed through according to the work of switch element.Control circuit, in the temperature of power supply than the low low-temperature condition of predetermined value, control the work of multiple chopper circuits, to make compared with the situation of the non-low-temperature condition higher than predetermined value with the temperature of power supply, the difference of the current value between each reactor increases, thereby the ripple component of electric current mobile in power supply is increased.
Preferably, multiple chopper circuits at least comprise: be adjusted at the 1st chopper circuit of electric current mobile in the 1st reactor and be adjusted at the 2nd chopper circuit of electric current mobile in the 2nd reactor (L2).The 1st reactor and the 2nd reactor are configured to mutual magnetic coupling.The in the situation that of low-temperature condition, control circuit control the 1st chopper circuit and the 2nd chopper circuit, to make compared with the situation with non-low-temperature condition, in the 1st reactor, the value of mobile electric current increases with the difference of the value of mobile electric current in the 2nd reactor.
Preferably, supply unit also has: the 1st transducer, the value of detection mobile electric current in the 1st reactor; With the 2nd transducer, detect the value of mobile electric current in the 2nd reactor.Control circuit comprises: configuration part, the voltage instruction value of the operating state setting power supply wiring based on load; And control part, carry out according to the detected value based on voltage instruction value and the 1st transducer the result that the 1st computing obtains, control the 1st chopper circuit, and carry out according to the detected value based on voltage instruction value and the 2nd transducer the result that the 2nd computing obtains, control the 2nd chopper circuit.The in the situation that of low-temperature condition, control part increases the migration processing of scheduled volume by carrying out the detected value of the transducer to the either party in the 1st transducer and the 2nd transducer, the value of electric current mobile in the 1st reactor and the difference of the value of mobile electric current in the 2nd reactor are increased.
Preferably, control part is according to the temperature change scheduled volume of power supply.
Preferably, in the time that predetermined condition is set up, control part switches the detected value of the object that becomes migration processing between the detected value of the 1st transducer and the detected value of the 2nd transducer.
Preferably, the in the situation that of low-temperature condition, what control circuit made that the work of the chopper circuit of the either party in the 1st chopper circuit and the 2nd chopper circuit stops stopping processing.
Preferably, in the time that predetermined condition is set up, control circuit switches the chopper circuit that becomes the object that stops processing between the 1st chopper circuit and the 2nd chopper circuit.
Preferably, each chopper circuit is included in the 1st and the 2nd switch element being connected in series between ground connection distribution and power supply wiring.Reactor have the 1st and the tie point of the 2nd switch element and power supply between the coil windings that connects, the coil windings of each chopper circuit is wound in the different parts of shared core body.
The effect of invention
According to the present invention, having in the supply unit of the multiphase converter that comprises magnetic coupling type reactor, in the case of the temperature of DC power supply is low, can be by making pulsating current increase make the temperature rise of DC power supply.
Brief description of the drawings
Fig. 1 is the circuit diagram that represents the structure of the motor drive of the supply unit with the embodiment of the present invention.
Fig. 2 is the circuit diagram that represents the structure example of magnetic coupling type reactor.
Fig. 3 is the functional block diagram of the control structure of explanation multiphase converter.
Fig. 4 is the flow chart (one) that represents the treatment step of control circuit.
Fig. 5 is the figure that represents to utilize the waveform of the reactor current that the result of control circuit obtains.
Fig. 6 is the flow chart (its two) that represents the treatment step of control circuit.
Fig. 7 is the functional block diagram of the control structure of explanation multiphase converter.
Fig. 8 is the flow chart (its three) that represents the treatment step of control circuit.
Fig. 9 is the flow chart (its four) that represents the treatment step of control circuit.
Label declaration
12 multiphase converters, 13-1, 13-2 chopper circuit, 14 converters, 15U phase arm, 16V phase arm, 17W phase arm, 20, 22 voltage sensors, 21, 27, 28 temperature sensors, 24, 25, 26 current sensors, 29 accelerator pedal position sensors, 200 motor drives, 210 control circuits, 220 loads, 241, 242 coil windings, 250 core bodys, 251a, the outer foot of 251b, 252 central foots, 253 gaps, 300 voltage instruction configuration parts, 310 subtraction portions, 320 control algorithm portions, 325 multiplying portions, 330 current control divisions, 331 the 1st current control divisions, 332 the 2nd current control divisions, 350 modulation portion, 351 the 1st modulation portion, 352 the 2nd modulation portion, 360 judging parts, B1 DC power supply, C0, C1 smmothing capacitor, D11, D12, D21, D22 diode, GL ground connection distribution, L1, L2 reactor, M1 alternating current motor, PL power supply wiring, Q11, Q12, Q21, Q22 switch element.
Embodiment
Below, embodiments of the present invention will be described in detail with reference to the accompanying drawings.In addition, to marking same label with the identical or considerable part in figure below and not repeating to be in principle described.
［ the 1st embodiment ］
Fig. 1 is the circuit diagram that represents the structure of the motor drive 200 of the supply unit with the embodiment of the present invention.
With reference to Fig. 1, motor drive 200 has multiphase converter 12, smmothing capacitor C1, control circuit 210 and the load 220 of DC power supply B1, magnetic coupling type.Form the supply unit of the embodiment of the present invention by multiphase converter 12 and control circuit 210.
DC power supply B1 output dc voltage.DC power supply B1 is made up of the secondary cell such as ni-mh or lithium ion typically.In the low-down situation of the temperature T B of DC power supply B1, DC power supply B1 can discharged power and chargeable electric power become very little value (for example thousands of watts of left and right).
Similarly, chopper circuit 13-2 is configured to same with chopper circuit 13-1, comprises switch element Q21 and Q22, diode D21 and D22, reactor L2.Reactor L2 is electrically connected between the node N2 as switch element Q21 and the connected node of Q22 and DC power supply B1.
In multiphase converter 12, reactor L1 and reactor L2 are configured to mutual magnetic coupling., reactor L1 and reactor L2 are set to form magnetic coupling type reactor.
Fig. 2 shows the structure example of magnetic coupling type reactor.
With reference to Fig. 2, magnetic coupling type reactor comprises core body 250 and is wound in the coil windings 241,242 of core body 250.Core body 250 comprises the outer 251a of foot, 251b and is configured to the central foot 252 relative across gap 253.
The coil windings 241 that forms reactor L1 is wound in the outer 251a of foot.The coil windings 242 that forms reactor L2 is wound in the outer 251b of foot.At this, if by the area of section of the outer 251a of foot and 251b be made as S1, length is made as LN1, the magneto-resistor R1 of the 251a of Ze Wai foot, 251b is as shown in following (1) formula.Similarly, if the area of section of central foot 252 is made as, S2, length are made as LN2, gap length is made as D, and the magneto-resistor R2 of central foot 252 is as shown in following (2) formula.In addition,, in (1), (2) formula, μ represents the permeability of core body 250, the airborne permeability that μ 0 represents gap.
R1≒（1/μ）·（LN1/S1） …（1）
R2≒（1/μ）·2·（LN2/S2）+1/μ0·（d/S2） …（2）
In the present embodiment, constant S1, LN1, S2, LN2, the d of magnetic coupling type reactor are configured to make the R2, the R1 that are represented by (1), (2) formula to become R2>>R1.
By such setting, because of coil windings 241 pass through that magnetic flux that electric current produces is most of to be linked with coil windings 242, and, because the magnetic flux major part that electric current produces of passing through of coil windings 242 links with coil windings 241.Its result, in Fig. 1, the counter electromotive force with the opposite direction of the electromotive force producing respectively at reactor L1 and reactor L2, produces at reactor L2 and L1 respectively.
In addition the equivalent electric circuit of recording in can pie graph 1, for the shape of core body 250, is not limited to the example of Fig. 2, as long as can be just arbitrarily.For example, also the 251a of foot, 251b also arrange gap outside.In addition, in the present embodiment, the number of phases of multiphase converter 12 is made as to 2 phases, but can be also 3 mutually more than.
Referring again to Fig. 1, smmothing capacitor C1 is connected between power supply wiring PL and ground connection distribution GL.And load 220 comprises connection power supply wiring PL and the converter 14 of ground connection distribution GL and the alternating current motor M1 being connected with converter 14.
On the direct current power of converter 14 on power supply wiring PL and two-way with respect to alternating current motor M1 and between the alternating electromotive force of input and output, carry out power converter.And alternating current motor M1 is subject to drive by the alternating electromotive force of converter 14 input and output, and produce positive torque or negative torque.
Alternating current motor M1 is made up of for example synchronous motor as the permanent-magnet type of motor generator work.Alternating current motor M1 is the CD-ROM drive motor for generation of the driving torque of the driving wheel of the motor vehicles such as hybrid vehicle, electric automobile or fuel cell car., motor drive 200 is mounted on motor vehicle typically.Alternating current motor M1, in the time that motor vehicle carries out regenerative braking, utilizes the rotatory force of actuating force to carry out regenerative electric power.
Or this alternating current motor M1 can be used as to be had by the function of engine-driven generator and for example can carry out the device of engine start for engine as motor work, is assembled in hybrid vehicle.
And then, input the signal from temperature sensor 21,27,28 and accelerator pedal position sensor 29 to control circuit 210.
Temperature sensor 21 detects the temperature T B of DC power supply B1.Temperature sensor 27 detects the temperature T L1 of reactor L1.Temperature sensor 28 detects the temperature T L2 of reactor L2.The testing result of temperature sensor 21,27,28 is input to control circuit 210.
Accelerator pedal position sensor 29 detects the tread-on quantity of user's step on the accelerator, and testing result is sent to control circuit 210 as signal for faster A.
The signal of the each transducer input of control circuit 210 based on from above-mentioned, rotating speed MRN and the torque instruction value TR of alternating current motor M1, control the conducting cut-off (switch motion) of switch element Q11, Q12 in multiphase converter 12 and converter 14, Q21, Q22, Q5～Q10, so that alternating current motor M1 moves according to action command.Specifically, control circuit 210, in order to be desirable voltage by the voltage control of power supply wiring PL, generates signal PWM1, PWM2 for the conducting cut-off of control switch element Q11, Q12, Q21, Q22.And then, control circuit 210 is in order to control the output torque of alternating current motor M1 according to torque instruction value TR, generate the signal PWMI for the conducting cut-off of control switch element Q5～Q10, to control amplitude and/or the phase place of the analog AC voltage applying to alternating current motor M1.
Chopper circuit 13-1,13-2 make the electric current after switch motion pass through reactor L1, L2 by switch element Q12, the Q22 conducting of underarm ended respectively, thereby can utilize by the diode D11 of upper arm, the current path that D21 forms, produce the direct voltage VH(power operation (Lixing) after the direct voltage VL of low-pressure side is boosted on power supply wiring PL time, I1>0, I2>0).
On the contrary, chopper circuit 13-1,13-2 make the electric current after switch motion pass through reactor L1, L2 by switch element Q11, the Q21 conducting of upper arm ended respectively, thereby can utilize by the diode D12 of underarm, the current path that D22 forms, by making direct voltage VL that on high-tension side direct voltage VH step-down obtains to DC power supply B1 charge (when regeneration, I1 < 0, I2 < 0).
In each chopper circuit 13-1,13-2, when power operation, also can make switch element Q11, the Q21 of upper arm be fixed as cut-off, when regeneration, also can make switch element Q12, the Q22 of underarm be fixed as cut-off.But, carry out switching controls just serially corresponding to regeneration and power operation for obstructed overcurrent direction, within each switch motion cycle, also can make switch element Q11, the Q21 of upper arm and the complementally conducting of switch element Q12, Q22 of underarm cut-off.
Below, in the present embodiment, the conduction period of the switch element of underarm is defined as to duty ratio DT with respect to the ratio in switch motion cycle., the conduction period of upper arm element is represented by (1.0-DT).According to the general characteristic of chopper circuit, the relation between the voltage transformation in this duty ratio DT and each chopper circuit 13-1,13-2 is as shown in following (3) formula.By making the distortion of (3) formula, on high-tension side voltage VH is as shown in (4) formula.
DT＝1.0－（VL/VH） ···（3）
VH＝VL/（1.0-DT） ···（4）
According to (3), (4) formula, if known switch element Q12, Q22 by underarm is fixed as cut-off (DT=0.0), VH=VL, voltage VH rises with duty ratio DT., control circuit 210, by the duty ratio DT of chopper circuit 13-1,13-2 is controlled, can be controlled the voltage VH of power supply wiring PL.Describe afterwards the detailed content of such transducer control in detail.
And then, in multiphase converter 12, by magnetic coupling type reactor, so that the mode that between chopper circuit 13-1,13-2, the ripple component of reactor current I1, I2 reduces mutually plays a role.Therefore, pulsating current is with respect to the characteristic of the duty ratio of the multiphase converter 12 of Fig. 1, different from common chopper circuit.
Fig. 3 is the functional block diagram of structure of the control of the multiphase converter 12 in the supply unit of the explanation embodiment of the present invention.The function of the each functional block shown in Fig. 3, can be processed and be realized by the software of control circuit 210, also can be by the electronic circuit (hardware) of realizing this function is formed and realized in control circuit 210.
With reference to Fig. 3, the control circuit 210 shown in Fig. 1 comprises voltage instruction configuration part 300, subtraction portion 310, control algorithm portion 320, multiplying portion 325, current control division 330, modulation portion 350 and judging part 360.
Setting voltage command value VHr is carried out according to voltage request value VHsys in voltage instruction configuration part 300.Voltage request value VHsys is the required value of the voltage VH of power supply wiring PL, for example, provide from external ECU (not shown).Voltage request value VHsys for example, for example, sets changeably according to the operate condition of load 220 (rotating speed MRN, the torque instruction value TR of alternating current motor M1) and/or user's requirement (signal for faster A).Voltage instruction value VHr is the control desired value of the voltage VH of power supply wiring PL.
Multiplying portion 325 is by being multiplied by the 0.5 current instruction value Ir#(Ir#=Ir/2 that calculates each chopper circuit 13-1,13-2 to the current instruction value Ir of multiphase converter 12 entirety).
The 1st current control division 331 is set duty ratio command value Id1 according to control algorithm (PI control algorithm etc.), and described control algorithm is the value of reactor current I1 that detects based on current sensor 25 and the current deviation of current instruction value Ir# and the computing carried out.
The value of the reactor current I2 that the 2nd current control division 332 detects based on current sensor 26 and the current deviation of current instruction value Ir#, set duty ratio command value Id2 according to the control algorithm same with the 1st current control division 331 (PI control algorithm etc.).
Duty ratio command value Id1, Id2 are set in the scope of 0.0≤Id1, Id2 < 1.0.The 1st current control division 331 and the 2nd current control division 332 are set duty ratio command value Id1, Id2, to make duty ratio increase in the time that current instruction value Ir# increases reactor current I1, I2 relatively, on the other hand, in the time that reactor current I1, I2 are reduced, duty ratio is declined.
Like this, in the situation that voltage VH is lower than voltage instruction value VHr, control chopper circuit 13-1 by pulse-width modulation (PWM), in the direction increasing with the duty ratio at underarm, set duty ratio command value Id1 reactor current I1 is increased.On the contrary, in the situation that voltage VH is higher than voltage instruction value VHr, control chopper circuit 13-1 by pulse-width modulation (PWM), to set duty ratio command value Id1 in the direction reducing in the duty ratio of underarm, reactor current I1 is reduced.
The 2nd modulation portion 352 has the function same with the 1st modulation portion 351, according to the reverse signal to above-mentioned carrier wave CW, phase place spend voltage ratio that the signal that obtains and duty ratio command value Id2 carry out from carrier wave CW skew 180, generation is used for controlling the signal PWM2 of chopper circuit 13-2.Thus, in chopper circuit 13-1,13-2, make switch motion control phase deviation after 180 degree, carry out independently respectively for voltage VH is controlled to the switch motion control (Duty ratio control) for voltage instruction value VHr.In addition, as mentioned above, between the off period of switch element Q12, the Q22 of underarm, also can make switch element Q11, the Q21 conducting of upper arm element.
Like this, according to the control structure shown in Fig. 3, in multiphase converter 12,2 the chopper circuit 13-1 and the chopper circuit 13-2 that are connected in parallel carry out work in the mode of 180 ° of phase shifting electric angles, and, in chopper circuit 13-1,13-2, carry out independently respectively the reactor current I1 for voltage VH is controlled to voltage instruction VHr, the control of I2.
Control when above control is common.By such control when common, actual reactor current I1 and reactor current I2 become big or small roughly the same.By keeping the balance of reactor current I1, I2, can reduce the ripple component of reactor current I1, I2 like this, also can reduce the ripple component of electric current mobile in DC power supply B1.Conventionally, there is internal resistance in DC power supply B1, if in DC power supply B1 streaming current, can produce the Joule heat corresponding with the size of ripple component in the inside of DC power supply B1.Therefore, reduce ripple component by the balance that keeps reactor current I1, I2, thereby can be suppressed at the heat of the inside generation of DC power supply B1, can reduce energy loss.
But, in the low-down situation of the temperature T B of DC power supply B1, as mentioned above DC power supply B1 can discharged power and chargeable electric power become very little value.In this case, cannot supply with sufficient electric power to alternating current motor M1, in addition, the regenerated electric power that alternating current motor M1 generating cannot be produced charges to DC power supply B1 fully.
Therefore, the supply unit of the present embodiment, in the case of the temperature T B of DC power supply B1 is lower than fiducial temperature T0, control chopper circuit 13-1,13-2, initiatively to break the balance of reactor current I1, I2 but not keep as mentioned above the balance of reactor current I1, I2.In addition, " break the balance of reactor current I1, I2 " and mean the difference increase that makes the size (mean value) of reactor current I1 and the size (mean value) of reactor current I2.The control this point of carrying out the balance of initiatively breaking reactor current I1, I2 temperature T B at DC power supply B1 like this is low is the maximum characteristic point of the supply unit of the present embodiment.
Carry out more specific description for this point, control circuit 210 also comprises judging part 360.Judging part 360 judges that whether temperature T B is lower than fiducial temperature T0, and judged result is outputed to current control division 330.
In the situation that temperature T B is higher than fiducial temperature T0, current control division 330 is set duty ratio command value Id1, Id2, initiatively to break the balance of reactor current I1, I2.Below, as an example of the method for disequilibrating, the situation of the value skew that makes the reactor current I1 that current sensor 25 detects is described.The method of disequilibrating in addition, is not limited thereto.Be documented in 2nd～4 embodiment about other example.
In the situation that temperature T B is higher than fiducial temperature T0, current control division 330 carries out above-mentioned control when common.The value of the reactor current I1 that, the 1st current control division 331 direct (former state) detects with current sensor 25 is carried out PI control algorithm and is set duty ratio command value Id1.Similarly, the value of the reactor current I2 that the 2nd current control division 332 directly detects with current sensor 26 is carried out PI control algorithm and is set duty ratio command value Id2.Thus, due to the size of reactor current I1, I2 is remained to roughly the same size, the ripple component that therefore reactor current I1, I2 comprise is minimized.
On the contrary, in the situation that temperature T B is lower than fiducial temperature T0, current control division 330 only makes the value skew of the reactor current I1 that current sensor 25 detects.The value that, the 1st current control division 330 uses the value of the reactor current I1 that current sensor 25 is detected to add that offset α (>0) obtains is carried out PI control algorithm and is set duty ratio command value Id1.Now, temperature T B is lower, and offset α is set to larger value.In addition, also offset α can be made as to fixed value.On the other hand, the value of the reactor current I2 that the 2nd current control division 332 directly detects with current sensor 26 is carried out PI control algorithm and is set duty ratio command value Id2.Thus, the balance of reactor current I1, I2 is broken, and the ripple component that is not offset the reactor current I2 of a side increases.Its result, because the ripple component of electric current mobile in DC power supply B1 also increases, the heat producing in the inside of DC power supply B1 increases, and therefore the temperature T B of DC power supply B1 rises.
Fig. 4 is the flow chart representing in order to realize the treatment step that above-mentioned function, control circuit 210 carry out.Each step of flow chart shown below (following, step is economized to slightly " S ") realizes by the software processing of control circuit 210 substantially, but also can realize by the hardware handles of the electronic circuit that arranges at control circuit 210 etc.
In S10, control circuit 210 judges that whether temperature T B is lower than fiducial temperature T0.This processing is equivalent to the function of the judging part 360 of Fig. 3.
In the situation that temperature T B is lower than fiducial temperature T0, (in S10, be) that control circuit 210 moves to S11 by processing and sets offset α (>0).In addition, as mentioned above, temperature T B is lower, and offset α is set to larger value.Then in S12, the value of the reactor current I1 that control circuit 210 use detect current sensor 25 adds that value that offset α obtains carries out PI control algorithm and set duty ratio command value Id1.Below the processing of the detected value skew that so makes current sensor is called to " migration processing ".
On the other hand, in the situation that temperature T B is higher than fiducial temperature T0 (no in S10), processing is moved to S13 by control circuit 210, and the value of the reactor current I1 directly detecting with current sensor 25 is carried out PI control algorithm and set duty ratio command value Id1., control circuit 210, in the situation that temperature T B is higher than fiducial temperature T0, does not carry out migration processing and carries out the control when common.
In S14, the value of the reactor current I2 that control circuit 210 directly detects with current sensor 26 is carried out PI control algorithm and is set duty ratio command value Id2.The processing of S11～S14 is equivalent to the function of the current control division 330 of Fig. 3.
In S15, control circuit 210 generates signal PWM1 based on duty ratio command value Id1, and generates signal PWM2 based on duty ratio command value Id2.In S16, signal PWM1, PWM2 are outputed to multiphase converter 12.The processing of S15, S16 is equivalent to the function of the modulation portion 350 of Fig. 3.
Fig. 5 represents to utilize control circuit 210 carry out the result after the migration processing reactor current I1 obtaining, the waveform of I2.In addition,, in order to compare, a chain-dotted line of Fig. 4 represents not carry out the waveform of the reactor current I2 in the situation of migration processing.
If the detected value of reactor current I1 is implemented to migration processing, the balance of reactor current I1, I2 is broken.Thus, the ripple component of reactor current I2 increases., as shown in Figure 5, the pulsation width β of the reactor current I2 in the situation that having carried out migration processing is larger than the pulsation width γ that does not carry out the reactor current I2 migration processing.Therefore, in the situation that temperature T B is lower than fiducial temperature T0, than compared with the high situation of fiducial temperature T0, in DC power supply B1, the ripple component of mobile electric current (electric current after reactor current I1, I2 are merged), has increased the amount of pulsation width β with the difference of pulsation width γ with temperature T B.Thus, the heat producing due to the inside of DC power supply B1 increases, so the temperature T B of DC power supply B1 rises.
As described above, the control circuit 210 of the present embodiment, in the case of the temperature T B of DC power supply B1 is lower than fiducial temperature T0, implements migration processing to the detected value of reactor current I1, initiatively to break the big or small balance of reactor current I1, I2.Thus, can make the ripple component increase of electric current mobile in DC power supply B1 make the temperature T B of DC power supply B1 increase rapidly, the input-output characteristic of DC power supply B1 is improved.
［ the 2nd embodiment ］
In the 1st above-mentioned embodiment, the object of migration processing is only the detected value of reactor current I1.
To this, in the 2nd embodiment, in the time that predetermined condition is set up, the object of migration processing is switched between the detected value of reactor current I1 and the detected value of reactor current I2.This point is the feature of the 2nd embodiment.Because other structure, function and processing are identical with the 1st above-mentioned embodiment, so do not repeat to describe in detail at this.
Fig. 6 is the flow chart of the treatment step that represents that the control circuit 210 of the 2nd embodiment carries out.In addition,, in the flow chart shown in Fig. 6, mark identical step number for the processing identical with the flow chart shown in above-mentioned Fig. 4.Their processing is also identical.Therefore, do not repeat in principle them to be elaborated at this.
In the situation that temperature T B is lower than fiducial temperature T0, (in S10, be) that control circuit 210 is set offset α in S11.
Then,, in S20, control circuit 210 judges whether in the migration processing in reactor current I1.
In the migration processing in reactor current I1 (in S20 being), control circuit 210 judges in S21 whether predetermined switching condition is set up.Wish that this switching condition is to consider that making the load of reactor L2 uprise this point (the ripple component increase of reactor current I2 and the temperature rise this point of reactor L2) by the migration processing of reactor current I1 sets.For example, the temperature T L2 of reactor L2 can be exceeded to this condition of higher limit as switching condition.In addition, also the time of the migration processing that continues the detected value that carries out reactor current I1 can be exceeded to this condition of the scheduled time as switching condition.
In the invalid situation of switching condition (no in S21), control circuit 210 is still made as the object of migration processing the detected value (S12, S14, S15, S16) of reactor current I1.On the other hand, in the situation that switching condition is set up (in S21 being), control circuit 210 switches to the object of migration processing the detected value of reactor current I2 from the detected value of reactor current I1.Specifically, in S13, directly carry out PI control algorithm with the detected value of reactor current I1 sets duty ratio command value Id1 to control circuit 210.Then in S23, control circuit 210 use add that to the detected value of reactor current I2 value that offset α obtains carries out PI control algorithm and set duty ratio command value Id2.
Similarly, in the migration processing in reactor current I2 (no in S20), control circuit 210 judges in S22 whether predetermined switching condition is set up.This switching condition is set with the same thinking of the thinking illustrated with the processing of above-mentioned S21.
In the invalid situation of switching condition (no in S22), control circuit 210 is still made as the object of migration processing the detected value (S13, S23, S15, S16) of reactor current I2.On the other hand, in the situation that switching condition is set up (in S22 being), control circuit 210 switches to the object of migration processing the detected value (S12, S14, S15, S16) of reactor current I1 from the detected value of reactor current I2.
Like this, in the 2nd embodiment, in the time that switching condition is set up, the object of migration processing is switched between the detected value of reactor current I1 and the detected value I2 of reactor current.Thus, even if continue for a long time to carry out migration processing, also can prevent that load is too partial to either party reactor, can prevent the controlled reduction of multiphase converter 12.
［ the 3rd embodiment ］
In the 1st above-mentioned embodiment, as the method for balance of breaking reactor current I1, I2, use the method for the detected value skew that makes reactor current I1.
On the other hand, in the 3rd embodiment, as the method for balance of breaking reactor current I1, I2, the method that the switch motion of the chopper circuit of any one party in two chopper circuit 13-1,13-2 is stopped.This point is the feature of the 3rd embodiment.Because other structure, function and processing are identical with the 1st above-mentioned embodiment, so do not repeat to describe in detail at this.
Fig. 7 represents the functional block diagram of the control circuit 210 of the 3rd embodiment.The main difference point of the control circuit 210 of the 3rd embodiment and the control circuit 210 of the 1st embodiment is following 2 points.The first, judging part 360 is not to current control division 330 by the judged result of oneself but exports to modulation portion 350.Second, in the situation that temperature T B is lower than fiducial temperature T0, not that current control division 330 carries out migration processing but modulation portion 350 stops the processing (following, also referred to as " one-sided cut-out processing (single sided switched action stops processing) ") of the either party in output signal PWM1, PWM2.Because other function is identical with the 1st above-mentioned embodiment, so do not repeat to describe in detail at this.
Fig. 8 is the flow chart of the treatment step that represents that the control circuit 210 of the 3rd embodiment carries out.In addition,, in the flow chart shown in Fig. 8, mark identical step number for the processing identical with the flow chart shown in above-mentioned Fig. 4.Their processing is also identical.Therefore, do not repeat them to be elaborated at this.
In S30, control circuit 210 judges that whether temperature T B is lower than fiducial temperature T0.
In the situation that temperature T B is higher than fiducial temperature T0 (no in S30), processing is moved to S32 by control circuit 210, carries out the control when common., signal PWM1 and these both sides of signal PWM2 are outputed to multiphase converter 12 by control circuit 210.
On the other hand, in the situation that temperature T B is lower than fiducial temperature T0, (in S30, be), processing is moved to S31 by control circuit 210, and the output of stop signal PWM1 only outputs to multiphase converter 12 by signal PWM2.Thus, chopper circuit 13-1 stops, only chopper circuit 13-2 work.This is treated to one-sided cut-out processing.
As described above, the control circuit 210 of the 3rd embodiment, in the case of the temperature T B of DC power supply B1 is lower than fiducial temperature T0, the processing that the switch motion of 2 chopper circuit 13-1 in chopper circuit 13-1,13-2 is stopped, initiatively to break the big or small balance of reactor current I1, I2.By such method, same with the 1st embodiment, also can initiatively break the big or small balance of reactor current I1, I2, can make the ripple component of electric current mobile in DC power supply B1 increase.
［ the 4th embodiment ］
In the 3rd above-mentioned embodiment, the object of one-sided cut-out processing is only chopper circuit 13-1.
To this, in the 4th embodiment, with the thinking same with the 2nd embodiment, in the time that predetermined condition is set up, the object of one-sided cut-out processing is switched between chopper circuit 13-1 and chopper circuit 13-2.This point is the feature of the 4th embodiment.Because other structure, function and processing are identical with the 1st above-mentioned embodiment, so do not repeat detailed explanation at this.
Fig. 9 is the flow chart of the treatment step that represents that the control circuit 210 of the 4th embodiment carries out.In addition,, in the flow chart shown in Fig. 9, the processing identical with the flow chart shown in above-mentioned Fig. 8 marked to identical step number.Their processing is also identical.Therefore, do not repeat in principle the detailed description to them at this.
In the situation that temperature T B is lower than fiducial temperature T0, (in S10, be) that control circuit 210 judges whether in stopping output signal PWM1 in S40.
In stopping output signal PWM1 in the situation that (in S40 being), control circuit 210, in S41, judges whether predetermined switching condition is set up.This switching condition is set with the same thinking of the thinking illustrated with the processing of the S21 of above-mentioned Fig. 6.For example, the time that continues to stop output signal PWM1 can be exceeded to this condition of the scheduled time and be made as switching condition.
In the invalid situation of switching condition (no in S41), control circuit 210 continues to stop output signal PWM1(S31).On the other hand, in the situation that switching condition is set up (in S41 being), control circuit 210 switches to signal PWM2 by the object of one-sided cut-out processing from signal PWM1.Specifically, control circuit 210, in S43, stops output signal PWM2, only output signal PWM1.
Similarly, in stopping output signal PWM2 in the situation that (no in S40), control circuit 210, in S42, judges whether predetermined switching condition is set up.This switching condition is set with the same thinking of the thinking illustrated with the processing of above-mentioned S41.
In the invalid situation of switching condition (no in S42), control circuit 210 continues to stop output signal PWM2(S43).On the other hand, in the situation that switching condition is set up (in S42 being), control circuit 210 switches to signal PWM1(S31 by the object of one-sided cut-out processing from signal PWM2).
Like this, in the 4th embodiment, in the time that switching condition is set up, the object of one-sided cut-out processing is switched between signal PWM1 and signal PWM2.Thus, even if continue for a long time one-sided cut-out processing, also can prevent that load is too partial to the reactor of any one party, can prevent the controlled reduction of multiphase converter 12.
Should think this disclosed embodiment be all in all respects illustrate and be not restricted contents.Scope of the present invention is not to represent by above-mentioned explanation, but represents by claim, and all changes within the scope of the meaning and the claim being equal to claim are included in the present invention.
Claims (4)
1. a supply unit, has multiphase converter (12), and this multiphase converter is included in and is connected in the 1st and the 2nd chopper circuit (13-1,13-2) being connected in parallel between the power supply wiring (PL) of load (220) and the power supply (B1) of direct current,
Described the 1st chopper circuit comprises the 1st switching circuit (Q11, Q12) and is configured to the 1st reactor (L1) that electric current is passed through according to the work of described the 1st switching circuit,
Described the 2nd chopper circuit comprises the 2nd switching circuit (Q21, Q22) and is configured to the 2nd reactor (L2) that electric current is passed through according to the work of described the 2nd switching circuit,
Described the 1st reactor and described the 2nd reactor are configured to mutual magnetic coupling,
Described supply unit also has:
The 1st transducer (25), the value of detection mobile electric current in described the 1st reactor;
The 2nd transducer (26), the value of detection mobile electric current in described the 2nd reactor; With
Control circuit, in the temperature of described power supply than the low low-temperature condition of predetermined value, control the described the 1st and the 2nd chopper circuit, to make compared with the situation of the non-low-temperature condition higher than described predetermined value with the temperature of described power supply, in described the 1st reactor, the value of mobile electric current increases with the difference of the value of mobile electric current in described the 2nd reactor, thereby the ripple component of electric current mobile in described power supply is increased
Described control circuit comprises:
Configuration part (300), the operating state based on described load is set the voltage instruction value of described power supply wiring; With
Control part (310,320,325,330,350), carry out according to the detected value based on described voltage instruction value and described the 1st transducer the result that the 1st computing obtains, control described the 1st chopper circuit, and carry out according to the detected value based on described voltage instruction value and described the 2nd transducer the result that the 2nd computing obtains, control described the 2nd chopper circuit
The in the situation that of described low-temperature condition, described control part increases the migration processing of scheduled volume by carrying out the detected value of the transducer to the either party in described the 1st transducer and described the 2nd transducer, the value of electric current mobile in described the 1st reactor and the difference of the value of mobile electric current in described the 2nd reactor are increased.
2. supply unit as claimed in claim 1, wherein,
Described control part is according to scheduled volume described in the temperature change of described power supply.
3. supply unit as claimed in claim 1, wherein,
In the time that predetermined condition is set up, described control part switches the detected value of the object that becomes described migration processing between the detected value of described the 1st transducer and the detected value of described the 2nd transducer.
4. supply unit as claimed in claim 1, wherein,
Described the 1st switching circuit is included in the 1st and the 2nd switch element (Q11, Q12) being connected in series between ground connection distribution (GL) and described power supply wiring,
Described the 2nd switching circuit is included in the 3rd and the 4th switch element (Q21, Q22) being connected in series between described ground connection distribution and described power supply wiring,
Described the 1st reactor has the 1st coil windings (241) being connected between the tie point (N1) of described the 1st switch element and described the 2nd switch element and described power supply,
Described the 2nd reactor has the 2nd coil windings (242) being connected between the tie point (N2) of described the 3rd switch element and described the 4th switch element and described power supply,
The the described the 1st and the 2nd coil windings is wound in the different parts (251a, 251b) of shared core body (250).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2010/052339 WO2011101959A1 (en) | 2010-02-17 | 2010-02-17 | Power supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102763313A CN102763313A (en) | 2012-10-31 |
| CN102763313B true CN102763313B (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201080064014.XA Expired - Fee Related CN102763313B (en) | 2010-02-17 | 2010-02-17 | Power supply device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8750008B2 (en) |
| EP (1) | EP2538531B1 (en) |
| JP (1) | JP5397532B2 (en) |
| CN (1) | CN102763313B (en) |
| WO (1) | WO2011101959A1 (en) |
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| JP5000025B1 (en) * | 2011-01-07 | 2012-08-15 | 三菱電機株式会社 | Charge / discharge device |
| US9008982B2 (en) * | 2012-03-09 | 2015-04-14 | Schweitzer Engineering Laboratories, Inc. | Systems and methods for determining residual flux in a power transformer |
| JP5626294B2 (en) | 2012-08-29 | 2014-11-19 | トヨタ自動車株式会社 | Power storage system |
| JP5652454B2 (en) * | 2012-09-28 | 2015-01-14 | 株式会社安川電機 | Power converter |
| GB2516683B (en) * | 2013-07-30 | 2016-03-02 | Control Tech Ltd | Modulation of switching signals in power converters |
| JP6292801B2 (en) | 2013-09-04 | 2018-03-14 | 株式会社豊田中央研究所 | Power system |
| JP6295809B2 (en) * | 2014-04-28 | 2018-03-20 | 株式会社安川電機 | Power conversion device, control device, and control method for power conversion device |
| JP6578093B2 (en) * | 2014-09-25 | 2019-09-18 | 本田技研工業株式会社 | Magnetically coupled reactor |
| JP6064968B2 (en) | 2014-10-10 | 2017-01-25 | トヨタ自動車株式会社 | Power system |
| JP6314099B2 (en) * | 2015-02-24 | 2018-04-18 | 株式会社日立製作所 | Power converter |
| JP6269647B2 (en) * | 2015-12-14 | 2018-01-31 | トヨタ自動車株式会社 | Power system |
| JP6634311B2 (en) * | 2016-02-24 | 2020-01-22 | 本田技研工業株式会社 | Power supply device, device and control method |
| JP6763013B2 (en) | 2016-03-04 | 2020-09-30 | 三菱電機株式会社 | In-vehicle power converter |
| JP6218906B1 (en) | 2016-09-21 | 2017-10-25 | 三菱電機株式会社 | Power converter |
| JP6397871B2 (en) * | 2016-11-04 | 2018-09-26 | 本田技研工業株式会社 | Power system |
| JP6435018B1 (en) * | 2017-05-31 | 2018-12-05 | 本田技研工業株式会社 | Electrical equipment |
| US10802054B2 (en) | 2017-09-22 | 2020-10-13 | Schweitzer Engineering Laboratories, Inc. | High-fidelity voltage measurement using a capacitance-coupled voltage transformer |
| WO2019060841A1 (en) | 2017-09-22 | 2019-03-28 | Schweitzer Engineering Laboratories, Inc. | High-fidelity voltage measurement using resistive divider in a capacitance-coupled voltage transformer |
| US11038342B2 (en) | 2017-09-22 | 2021-06-15 | Schweitzer Engineering Laboratories, Inc. | Traveling wave identification using distortions for electric power system protection |
| US11013070B2 (en) * | 2018-07-23 | 2021-05-18 | General Electric Company | System and method for controlling multiple IGBT temperatures in a power converter of an electrical power system |
| JP2020031501A (en) * | 2018-08-23 | 2020-02-27 | ヤンマー株式会社 | Control apparatus for electric power conversion device |
| US11187727B2 (en) | 2019-04-29 | 2021-11-30 | Schweitzer Engineering Laboratories, Inc. | Capacitance-coupled voltage transformer monitoring |
| JP6856099B2 (en) * | 2019-09-06 | 2021-04-07 | 株式会社明電舎 | Control device for series multiple inverter |
| JP7361310B2 (en) * | 2020-02-13 | 2023-10-16 | パナソニックＩｐマネジメント株式会社 | power conversion system |
| JP7279694B2 (en) * | 2020-08-25 | 2023-05-23 | トヨタ自動車株式会社 | Control device |
| DE112021007967T5 (en) * | 2021-07-14 | 2024-04-25 | Mitsubishi Electric Corporation | POWER CONVERTER |
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- 2010-02-17 EP EP10846098.1A patent/EP2538531B1/en not_active Not-in-force
- 2010-02-17 US US13/574,289 patent/US8750008B2/en not_active Expired - Fee Related
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| JP2003304681A (en) * | 2002-04-11 | 2003-10-24 | Toyota Motor Corp | Direct-current voltage converter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2011101959A1 (en) | 2013-06-17 |
| WO2011101959A1 (en) | 2011-08-25 |
| EP2538531A1 (en) | 2012-12-26 |
| CN102763313A (en) | 2012-10-31 |
| EP2538531A4 (en) | 2014-03-05 |
| EP2538531B1 (en) | 2015-04-08 |
| JP5397532B2 (en) | 2014-01-22 |
| US8750008B2 (en) | 2014-06-10 |
| US20120300523A1 (en) | 2012-11-29 |
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